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<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.functional.adapters.unfused_typed"></a><a class="link" href="unfused_typed.html" title="unfused_typed">unfused_typed</a>
</h4></div></div></div>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h0"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.description"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.description">Description</a>
        </h6>
<p>
          An n-ary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
          Object</a> adapter template for an unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic
          Function Object</a> target function. When called, its arguments are
          bundled to a <a class="link" href="../../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random
          Access Sequence</a> that is passed to the target function object.
        </p>
<p>
          The call operators of resulting function objects are strictly typed (in
          other words, non-templatized) with the types from a <a class="link" href="../../sequence.html" title="Sequence">Sequence</a>.
        </p>
<p>
          The type of the target function is allowed to be const qualified or a reference.
          Const qualification is preserved and propagated appropriately (in other
          words, only const versions of <code class="literal">operator()</code> can be used
          if the target function object is const - or, in case the target function
          object is held by value, the adapter is const).
        </p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
            For Microsoft Visual C++ 7.1 (Visual Studio 2003) the detection of the
            Function Object's const qualification easily causes an internal error.
            Therefore the adapter is always treated as if it was const.
          </p></td></tr>
</table></div>
<div class="tip"><table border="0" summary="Tip">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Tip]" src="../../../../../../../doc/src/images/tip.png"></td>
<th align="left">Tip</th>
</tr>
<tr><td align="left" valign="top"><p>
            If the type sequence passed to this template contains non-reference elements,
            the element is copied only once - the call operator's signature is optimized
            automatically to avoid by-value parameters.
          </p></td></tr>
</table></div>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h1"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.header"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.header">Header</a>
        </h6>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">adapter</span><span class="special">/</span><span class="identifier">unfused_typed</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h2"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.synopsis"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.synopsis">Synopsis</a>
        </h6>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Function</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Sequence</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">unfused_typed</span><span class="special">;</span>
</pre>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h3"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.template_parameters"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.template_parameters">Template
          parameters</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Parameter
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
<th>
                  <p>
                    Default
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">Function</span></code>
                  </p>
                </td>
<td>
                  <p>
                    A unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic
                    Function Object</a>
                  </p>
                </td>
<td>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">Sequence</span></code>
                  </p>
                </td>
<td>
                  <p>
                    A <a class="link" href="../../sequence.html" title="Sequence">Sequence</a>
                  </p>
                </td>
<td>
                </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h4"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.model_of"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.model_of">Model
          of</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
              Object</a>
            </li>
<li class="listitem">
              <a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred Callable
              Object</a>
            </li>
</ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl class="variablelist">
<dt><span class="term"><code class="computeroutput"><span class="identifier">F</span></code></span></dt>
<dd><p>
                A possibly const qualified, unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic
                Function Object</a> type or reference type thereof
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd><p>
                An object convertible to <code class="computeroutput"><span class="identifier">F</span></code>
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">S</span></code></span></dt>
<dd><p>
                A <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> of parameter types
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">UT</span></code></span></dt>
<dd><p>
                The type <code class="computeroutput"><span class="identifier">unfused_typed</span><span class="special">&lt;</span><span class="identifier">F</span><span class="special">,</span><span class="identifier">S</span><span class="special">&gt;</span></code>
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">ut</span></code></span></dt>
<dd><p>
                An instance of <code class="computeroutput"><span class="identifier">UT</span></code>,
                initialized with <code class="computeroutput"><span class="identifier">f</span></code>
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code></span></dt>
<dd><p>
                Arguments to <code class="computeroutput"><span class="identifier">ut</span></code>,
                convertible to the types in <code class="computeroutput"><span class="identifier">S</span></code>
              </p></dd>
</dl>
</div>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h5"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.expression_semantics"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.expression_semantics">Expression
          Semantics</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Expression
                  </p>
                </th>
<th>
                  <p>
                    Semantics
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">UT</span><span class="special">(</span><span class="identifier">f</span><span class="special">)</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Creates a fused function as described above, initializes the
                    target function with <code class="computeroutput"><span class="identifier">f</span></code>.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">UT</span><span class="special">()</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Creates a fused function as described above, attempts to use
                    <code class="computeroutput"><span class="identifier">F</span></code>'s default constructor.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">ut</span><span class="special">(</span><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span><span class="special">)</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Calls <code class="computeroutput"><span class="identifier">f</span></code> with
                    an instance of <code class="computeroutput"><span class="identifier">S</span></code>
                    (or a subsequence of <code class="computeroutput"><span class="identifier">S</span></code>
                    starting at the first element, if fewer arguments are given and
                    the overload hasn't been disabled) initialized with <code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code>.
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h6"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.example"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.example">Example</a>
        </h6>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">add_assign</span> <span class="comment">// applies operator+=</span>
<span class="special">{</span>
    <span class="keyword">typedef</span> <span class="keyword">void</span> <span class="identifier">result_type</span><span class="special">;</span> <span class="comment">// for simplicity</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
    <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span> <span class="special">&amp;</span> <span class="identifier">lhs</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">rhs</span><span class="special">)</span> <span class="keyword">const</span>
    <span class="special">{</span>
        <span class="identifier">lhs</span> <span class="special">+=</span> <span class="identifier">rhs</span><span class="special">;</span>
    <span class="special">}</span>
<span class="special">};</span>

<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Tie</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">fused_parallel_adder</span>
<span class="special">{</span>
    <span class="identifier">Tie</span> <span class="identifier">tie_dest</span><span class="special">;</span>
<span class="keyword">public</span><span class="special">:</span>
    <span class="keyword">explicit</span> <span class="identifier">fused_parallel_adder</span><span class="special">(</span><span class="identifier">Tie</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">dest</span><span class="special">)</span>
        <span class="special">:</span> <span class="identifier">tie_dest</span><span class="special">(</span><span class="identifier">dest</span><span class="special">)</span>
    <span class="special">{</span> <span class="special">}</span>

    <span class="keyword">typedef</span> <span class="keyword">void</span> <span class="identifier">result_type</span><span class="special">;</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">&gt;</span>
    <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">s</span><span class="special">)</span> <span class="keyword">const</span>
    <span class="special">{</span>
        <span class="identifier">for_each</span><span class="special">(</span> <span class="identifier">zip</span><span class="special">(</span><span class="identifier">tie_dest</span><span class="special">,</span><span class="identifier">s</span><span class="special">),</span> <span class="identifier">fused</span><span class="special">&lt;</span><span class="identifier">add_assign</span><span class="special">&gt;()</span> <span class="special">);</span>
    <span class="special">}</span>
<span class="special">};</span>

<span class="comment">// accepts a tie and creates a typed function object from it</span>
<span class="keyword">struct</span> <span class="identifier">fused_parallel_adder_maker</span>
<span class="special">{</span>
    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Sig</span><span class="special">&gt;</span>
    <span class="keyword">struct</span> <span class="identifier">result</span><span class="special">;</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Self</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">&gt;</span>
    <span class="keyword">struct</span> <span class="identifier">result</span><span class="special">&lt;</span> <span class="identifier">Self</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">&gt;</span>
    <span class="special">{</span>
        <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">remove_reference</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">seq</span><span class="special">;</span>

        <span class="keyword">typedef</span> <span class="identifier">unfused_typed</span><span class="special">&lt;</span> <span class="identifier">fused_parallel_adder</span><span class="special">&lt;</span><span class="identifier">seq</span><span class="special">&gt;,</span>
            <span class="keyword">typename</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">transform</span><span class="special">&lt;</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">remove_reference</span><span class="special">&lt;</span><span class="identifier">_</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">type</span> <span class="special">&gt;</span> <span class="identifier">type</span><span class="special">;</span>
    <span class="special">};</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">&gt;</span>
    <span class="keyword">typename</span> <span class="identifier">result</span><span class="special">&lt;</span> <span class="keyword">void</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">&gt;::</span><span class="identifier">type</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">tie</span><span class="special">)</span>
    <span class="special">{</span>
        <span class="keyword">return</span> <span class="keyword">typename</span> <span class="identifier">result</span><span class="special">&lt;</span> <span class="keyword">void</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">&gt;::</span><span class="identifier">type</span><span class="special">(</span>
            <span class="identifier">fused_parallel_adder</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;(</span><span class="identifier">tie</span><span class="special">)</span> <span class="special">);</span>
    <span class="special">}</span>
<span class="special">};</span>
<span class="identifier">unfused</span><span class="special">&lt;</span><span class="identifier">fused_parallel_adder_maker</span><span class="special">&gt;</span> <span class="identifier">parallel_add</span><span class="special">;</span>

<span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span>
<span class="special">{</span>
    <span class="keyword">int</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">2</span><span class="special">;</span> <span class="keyword">char</span> <span class="identifier">b</span> <span class="special">=</span> <span class="char">'X'</span><span class="special">;</span>
    <span class="comment">// the second call is strictly typed with the types deduced from the</span>
    <span class="comment">// first call</span>
    <span class="identifier">parallel_add</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">2</span><span class="special">);</span>
    <span class="identifier">parallel_add</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)(</span><span class="number">3</span><span class="special">);</span>
    <span class="identifier">parallel_add</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)();</span>
    <span class="identifier">assert</span><span class="special">(</span><span class="identifier">a</span> <span class="special">==</span> <span class="number">8</span> <span class="special">&amp;&amp;</span> <span class="identifier">b</span> <span class="special">==</span> <span class="char">'Z'</span><span class="special">);</span>
<span class="special">}</span>
</pre>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h7"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused_typed.see_also"></a></span><a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.see_also">See
          also</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <a class="link" href="unfused.html" title="unfused"><code class="computeroutput"><span class="identifier">unfused</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="../../support/deduce.html" title="deduce"><code class="computeroutput"><span class="identifier">deduce</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="../../support/deduce_sequence.html" title="deduce_sequence"><code class="computeroutput"><span class="identifier">deduce_sequence</span></code></a>
            </li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman,
      Dan Marsden, Tobias Schwinger<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
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